The Simpson TA9ZKT TA 8-1/4 in. 12-Gauge ZMAX Galvanized Staircase Angle is a heavy-duty structural connector from Simpson built for use in structurally sound staircase framing. By eliminating complicated stringer notching, it protects the structural integrity of stair stringers while delivering more consistent, straight corner connections. Its narrow profile extends its usefulness beyond stair construction, making it a reliable choice for heavy-duty 90 deg. connections wherever a slimmer angle is required. ZMAX galvanization provides enhanced corrosion resistance, keeping this connector well suited for exterior framing and treated-wood applications. Each kit includes two staircase angles and the Strong-Drive SDS Heavy-Duty Connector screws needed for installation, so the job is ready to start right out of the box.

Key Features

• Engineered for structurally sound staircase framing - provides a code-appropriate connection that supports a safe, solid stair assembly.
• Eliminates complicated stringer notching - removes a cut that can weaken stair stringers, preserving the full structural strength of the stringer.
• Narrow profile handles heavy-duty 90 deg. connections - works in tight framing situations where a standard-width angle will not fit, expanding its use beyond stair construction.
• Made from 12-gauge steel - delivers the thickness required for heavy-duty connector performance in demanding structural applications.
• ZMAX galvanization offers extra corrosion resistance - outperforms standard galvanized coatings in exterior conditions and when in contact with treated wood, extending the service life of the connection.
• Installs with included 1/4 in. x 1-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws - fasteners are matched and included, so installation can begin immediately without sourcing separate hardware.

Why This Product

• Preserves stringer strength where it matters most - by replacing notch cuts with a surface-mounted angle connector, this product protects the load-bearing capacity of stair stringers that notching would otherwise compromise.
• ZMAX coating means long-term reliability outdoors and with treated lumber - the elevated corrosion protection makes this connector a dependable choice for deck stairs, exterior framing, and any application where moisture or chemical exposure is a concern.
• Versatile beyond the staircase - the narrow 8-1/4 in. profile and heavy-duty 12-gauge construction make this angle equally useful for 90 deg. framing connections in confined spaces, adding value across a wider range of projects.
• Everything needed for installation is included - the kit bundles two angles with the appropriate Strong-Drive SDS Heavy-Duty Connector screws, eliminating guesswork and keeping the project moving without additional trips for fasteners.

Specifications

• Model Number: TA9ZKT
• Length: 8-1/4 in.
• Gauge: 12
• Coating/Finish: ZMAX
• Country of Origin: United States

Approved Applications

• Structurally sound staircase framing
• Heavy-duty 90 deg. connections where a narrow angle is needed
• Exterior construction and treated-wood applications requiring enhanced corrosion resistance

What's Included

Each kit contains 2 - Simpson Strong-Tie TA 8-1/4 in. ZMAX Staircase Angles, 1/4 in. x 1-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws.

Frequently Asked Questions

What is the purpose of the Simpson TA9ZKT staircase angle?

The TA9ZKT staircase angle is designed for use in structurally sound staircase framing. It eliminates complicated stringer notching that can weaken the stair stringers, providing a stronger and more consistent framing connection.

What type of coating does the TA9ZKT have, and why does it matter?

The TA9ZKT features ZMAX galvanization, which offers extra corrosion resistance compared to standard galvanized coatings. This makes it especially well-suited for exterior applications and use with treated wood, where exposure to moisture and chemicals is a concern.

What fasteners are used to install the Simpson TA9ZKT?

The TA9ZKT is installed with 1/4 in. x 1-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws, which are included with the kit.

Can the TA9ZKT be used for applications other than stair framing?

Yes. In addition to staircase framing, the TA9ZKT is also ideal for heavy-duty 90 deg. connections where a narrow angle is needed, making it a versatile connector for various structural framing projects.